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Megalodon was the biggest predator ever to swim the oceans. And for 20 million years, this ferocious 50-ton shark with a 9-foot jaw and 7-inch serrated teeth terrorized the creatures of the seas. Now, nearly 2 million years after its extinction, a team of scientists is combining research on today's great white with the only Megalodon fossils ever found to unlock the mysteries of this apex predator.

For the first time ever, National Geographic presents its programming in DVD-R format. Available exclusively through this site, you can now own more of our award-winning specials and documentaries in a high-quality DVD format.

How our DVDs and DVD-Rs Differ

Customers who purchase programs in the NG DVD Exclusives Library will receive a non-interactive, play only disc. There is no chaptering information on these DVDs, but there are chapter marks approximately every five minutes, which make it easy to fast forward through a program. The DVD-R format provides the digital video and audio quality you expect from all of our DVDs.

NOTE: The NG DVD Exclusives titles are not closed-captioned. We apologize for any inconvenience this limitation may cause.

One of the most famous programs from the National Geographic Society, The Sharks takes you on a special expedition to study these fish of fearful legend and challenge the myths surrounding them. Journey below the ocean's surface in a specially-designed cage to observe sharks at close range. Witness as Ron and Valerie Taylor, underwater filmmakers, test a mesh stainless steel suit which enables her to survive a shark attack. Meet these living symbols of terror face-to-face and learn the truth about these remarkable creatures.

See the world's first MRI scan of a great white shark as Ultimate Shark reveals the extreme engineering and predatory abilities of one of nature's most near perfect predators. Hear firsthand accounts of people who survived harrowing encounters, including a surfer who was bitten on the arm and leg, towed by the surfboard ankle strap and miraculously escaped only with minor injuries. National Geographic demystifies the true motives and power behind their behavior.

From out of the dusk and darkness of the night come more than half of all living things. Perceived as mysterious and supernatural, night creatures are masterpieces of adaptation... guided by their superior sense of sight, sound, and smell. Watch as National Geographic cameras reveal astonishing nocturnal scenes of the eerie vampire bat feeding on the blood of cattle, the great horned owl as it swoops down on its prey, and the wild hyena, Africa's well-known scavenger. Dare to enter the world of darkness to learn the truth about the Strange Creatures of the Night.

Hidden beneath the surface of the sea is a phenomenon we know almost nothing about. On land, scientists have long studied the great animal migrations, but in the ocean some of the most spectacular events go almost unnoticed. Now, with an international team of scientists, National Geographic examines the movements of hammerhead sharks. How do they navigate? Do they possess an internal compass? What prompts them to seek out distant destinations? In a world threatened by overfishing and declining marine populations, understanding their behavior may be the key to ensuring hammerhead survival.

Deep in the heart of Africa, an elusive man-sized predator known as the tiger fish prowls the waters of one of the most powerful rivers. While locals believe this ravenous relative of the piranha is cursed, scientists believe the fearsome fish may hold the key to understanding the evolution of an extraordinary array of bizarre creatures found throughout the Congo. Journey into Africa's Congo River Basin as National Geographic embarks on a treacherous expedition to find out what powerful environmental forces created the tiger fish and to reveal the array of fantastic creatures that also inhabit this underwater Eden.

Equipped with three-inch long canines and retractable claws like switchblades, big cats are among the fiercest and most fascinating beasts on the planetcapable of taking down fleet footed antelope or two ton elephants. National Geographic crawls through African grasslands and swamps of India to track and reveal the ultimate engineering and ambush tactics of lions, tigers, and leopards.

On Christmas Day 2007, a 243-pound Siberian tiger named Tatiana escaped from her open-air enclosure at the San Francisco Zoo and mauled three young men. Before long, one 17-year-old boy and the 4-year-old tigress lay dead. The incident was the first time a visitor was killed by an escaped animal at an accredited zoo in the United States. Zoo Tiger Escape investigates the how and why of what really happened that nightfrom the possible motivational factors that led the tiger to escape, to the complex evolution of enclosure design. The show provides exclusive documentary access to the San Francisco Zoo's efforts to reconstruct its tiger enclosure, as well as candid interviews with zoo staff members on the tragedy.

Every day in the United States, 12,000 Special Agents spread out from 56 field offices to investigate a myriad of cases, but few have witnessed their efforts in the field up close and personal, until now. With extraordinary access to teams of FBI agents, National Geographic cameras take you inside the perilous world of one of America's most elite law enforcement agencies, offering a rare glimpse of their investigative strategies and techniques in action.

An eruption of Santorini some 3,600 years ago was one of the largest, yet most mysterious, natural calamities in human history and may have wiped out an entire civilization. Much of the evidence of its destruction has been lost at sea until now. National Geographic Explorer-in-Residence Robert Ballard and an international team of volcanologists, armed with a state-of-the-art Remote Operated Vehicle fitted with HD cameras, dive into the belly of the Santorini's submerged caldera.

Women are being incarcerated in record numbersand the majority of women in prison are mothers. Since mothers are often the primary or sole caregivers to their children, their incarceration can destroy a family. Lisa Ling sets out to understand what life is like for the daughters of women behind bars and how new programs are attempting to help break the cycle of imprisonment from mother to daughter.

Every element of control at Hays State Prison feeds one central purpose: to keep convicted and dangerous felons inside. But when it all fails, two inmates make their move for freedom. National Geographic follows the intense manhunt for two escaped convicts. Inmates go into lockdown, tactical squads assemble and K-9 units scour the riverside looking for clues. Meet one of the best manhunters in the state and watch the shakedown as inmates are interrogated, cells are ripped apart, and everything is searched.

National Geographic follows new inmates entering the Georgia Diagnostic and Classification Prison before they are sent to a permanent facility to serve their hard time. Follow correctional officers as they get new inmatesfrom murderers to minor offendersshaved, showered, deloused and ready to be immersed into prison life.